Piston-ring-spring machine



March 11, 1930.

March l1, 1930.

o. E. szEKl-:LY Er AL PISTON'RING SPRING MACHINE Filed Sept. 23. 1927 2 Sheets-Sheet 2 iw N.

Patented Mar. 11, 1930 UNITED STATES PATENT OFFICE OTTO E. SZFJIELY AND RUSSELL H. JOHNSON, OF HOLLAND, MICHIGAN PISTON-RING-SPRNG MACHINE Application filed September 23, 1927.

r1`his invention relates to machines for making inner ring springs for piston rings of the conventional type and it is particularly adapted for making inner ring springs such disclosed in the co-pending application of Otto E. Szekely, Ser. No. 33,938, filed June 1, 1925. Y

The object of the invention is toV provide a machine which is capable of making two inner ring springs at the same time and which will crimp the fiat stock at certain intervals so that each crimp will have the same radius. Another object is to provide a machine which will cut theV ring from a roll of flat stock which ordinarily comes wound on spools, so that the ends of the finished ring will be at the Ycenter of one of the crimps. I

Another object is to provide a machine havingvnovel and improved feeding rollers which are adjustable and removable whereby the diameter of the main roll determines the size of the finished inner ring.

And a further object is to provide a machine which is simple and compact, which is efficient and accurate, and which can be readily and economically manufactured.

A selected embodiment of the invention is shown in the accompanyingdrawings in which,

Fig. 1 is a transverse sectional view taken on the center line of the main drive shaft.

Fig. 2 is a similar view taken on the center line of the forming dies.

Fig. 3 is a longitudinal sectional view taken 35 through the center line of the feed roller,

and

Fig. 4 is a sectional view taken longitudinally of the machine.

Referring to the drawings 1 designates the Serial No. 221,440.

shaft. A gear 9 fixed to the shaft 8 drives a gear 10 through an idler gear 11, Fig. 4. Another vertical shaft 12 Fig. 3 carrying the gear 10 drives the worm shaft 13 which may be connected to the shaft 12 by a coupling 55 14 and thev shaft 13 is adapted to have vertical movement relative to the shaft 12. The worm shaft 13 drives the worm gear 15 on the shaft 16 suitably mounted in the gear box 17, which is connected to the frame 2 and adapt- 60 ed to have vertical movement relative to the frame, being fastened to the frame by bolts entering slots therein (not shown). The shaft 16 and the shaft 18 of the feed roller 19 are connected together by a coupling 20. 65 The roller 19 comes in various diameters depending upon the size of the inner ring to be made and the vertical movement of the gear box and the gears provides the necessary adjustment to accommodate these various sized rollers. The roller 19 bears against an idler roller 21 mounted in anti-friction bearings 22 arranged in the frame, and the roller shaft 18 runs in bronze bearings 23 at the top only, as the lower part of the roller 19 is 75. supported uponthe idler roller 21.

f A yoke 24 Fig. 3 arranged in the frame 2 is provided with sockets 25 which accommodate the springs 26 which bear on the top of the bearings 23, as shown in Fig. 3. Com- 80.

Vpression of the `springs 26 is furnished by the studs 27 and the screw 28 which is locked by the knurled nut 29 Figs. 3 and 4 to keep the roller 19 in tightv operative relation with the idler roller 21.

A worm wheel 30 Fig. 4 fixed to the shaft 31 which is mounted in suitable bearings in the frame 2 is driven by a worm 32 fixed to the main drive shaft 3. A forming roller 33 held to the shaft 31 by keys 34 Fig. 2 and ro- 90 tatable therewith is provided with a plurality of integral projections 35, there being as many of these projections 35 as there are to be crimps formed in the finished inner ring spring.

The forming roller 33 turns slowly due to the timing and the size of the operating gears and contacts with an operating roller 36 mounted to rotate freely in the guide 37. The guide 37 is slidably mounted on the ver- 100 er 36 there is 'free vertical motion betweenv the upper die 42 and the lower die 43 which is rigidly mounted on the bracket 41. A bar 44 Fig. 4 loosely connected to the upper die 42 and spaced therefrom by the springs'45 comes in contact with the inner ring stock 46 before the stock is touched. by the upper die. This bar holds the stock 46 against the lower die 43 while the crimping operation takes place. llVhen the upper die recedes, or

0 raises upwardly, the bar 44 will hold the stock in position for a slight predetermined distance which is equivalent to the player the loose connection between the bar and the upper die, after which it willmcve upward with the upper die and allow the stoclrto'be fed throughthe dies for the next crimping operation. The lower die 43 is rounded as at 47 Fig. 4, and engages the slots k48 in the upper die to give the correct desired curvature orcrimp to the inner ring spring.

whichregister with slots in the lower die 43 so that when. the inner ring is complete it can be cut 'from the stock. This is accom- "plished by providing one of the projections;

ing rollers to remove any dirt Jfrom the stock. After the rings are completed and cut from the stock they are directed out of the machine `by -the lower side guide 52 and ythe side guides 53.

rlhe machine has been designed tofmakej two inner rings at one time which is more expedient than making only one at a. time, while more than two may cause complica` tions due to the eXtray mechanism required although it is possible to make more than two springs at one time and the invention is not limited in this respect.

The operation or the machine is as tollows: The stock 46 is fed between the main roller 19 and the idler 21, the parts being lso timed and constructed so that one complete revolution of the roller 19 will deterkmine the size of the finished inner ring. rThey rllhe lower die 43 and the bracket 41 have a slot provided therein to v allow any slugs cut therefrom to fall through i and prevent possible amming of the machine.

The machine may also be provided with a pair of felt blocks oOFig. 4 heldin the clamp 51 and arranged in front of the feet stock is thus fed to the dies 42 and 43 where 1 the forming roller will cause the stock to be crimped at certain spaced intervals, in this instance 6, when the longer Yprojection 35 on the forming roller 33 will cause the shear blades to cut the stock at the center of the last crimp thereby providing a heXagonal spring inner ring lla-ving 6 criinps of equal radii one of which is cut at the center.

The longer one of theprojections 35 is spaced at an unequal distance lin relation to the other projection 35, because if this longer projection were spaced the same distance from t-he other projections, the roller would natudeparting' from the spirit of theinvention or Y sacriiicing any of its advantages and the right 1s hereby reserved to make all suclrchanges as ,fairly fall within the scope of the following rlhe upper die also carries shear blades 49' claims. g d Y Y `We claim: Y 1. A machine formaking piston ring springs comprising a base, a frame, rollers in said :trame'for feeding material to Vthe machine, means for rotating one of said rollers, a torming roller, means driven by said lirst named means for driving the forming roller, an upper movable die, a stationary lower die, an operating roller cooperating with said forming roller for reciprocating said'upper die, and means arranged in said upper die for cutting the material after it has been crimped.

2. A machine for making pistony ringV springs comprising a base, a frame, adriven feed roller, an idler roller, means arranged in rontv of said rollers for feeding material thereto, means for driving said feed r0ller,.a forming roller having projections thereon, an operating roller, an upper die cooperating with said operating roller and adapted to be reciprocated due to the Vprojections on the forming roller, a rigidly mounted lower r die whereby said material is intermittently crimped upon each reciprocation vof the upper die, and shearing plates arrangedin the upper die for cutting the material at the center of one of the crimps at each revolution of the forming die. f

3. A machine for making piston ring springs comprising a base, a frame, a drive shaft mount-ed in said frame, a forming roller mounted in said frame, means operatedby said shaft for driving said forming roller, vertical guide pins lixedr to said frame, a

izo

guide slidably mounted on said pins, an operating roller mounted in said guide and operated by said forming roller to reciprocate said guide, an upper die arranged on said guide and adaptedto reciprocate therewith, a bar loosely connected to said guide, a lower die rigidly secured to said pins, and means for feeding material to said guides to be crimped at predetermined spaced intervals.

4. A machine for making piston ring springs comprising a base, a frame, a feed roller and an idler arranged in said frame for feeding material to the machine, the diameter of the feed roller determining the size of the finished ring, a forming roller having a plurality of integral .projections for crimping the material, the number of projections determining the number of crimps to be made, guide pins fixed to said base and said frame, a guide slidably mounted on said guide pins, an upper die arranged in said guide, an operating roller mounted in said guide and operated by said forming roller to reciprocate said upper die and, a lower die rigidly supported in said frame, whereby the material is crimped by said dies.

5. A machine for making piston ring springs comprising a base, a frame, a feed roller and an idler arranged in said frame for feeding material to the machine, the diameter of the feed roller determining the size 0f the finished ring, a forming roller having a plurality of integral projections for crimping the material, the number of projections determining the number of crimps, guide pins fixed to said base and said frame, a guide slidably mounted on said guide pins,

' an upper die arranged in said guide, an operating roller mounted in said guide and operated by said forming roller to reciprocate said upper die, a lower die rigidly supported in said frame whereby the material is crimped as Vit is fed between said dies, and means operated by said upper die to cut the material after each complete revolution of the forming roller..

6. A machineV for making piston ring springs comprising a base, a frame, a feed roller and an idler arranged in said frame for feeding material to the machine, the diameter of the feed roller determining the size of the finished ring, a forming roller having a plurality of integral projections to crimp the material, one of said projections being longer than the others, the number of projections determining the number of crimps, guide pins fixed to said base and said frame, a guide slidably mounted on said guide pins, an upper die arranged in said guide, an operating roller mounted in said guide and operated by said forming roller to reciprocate said upper die, a lower die rigidly supported in said frame whereby the material is crimped as it is fed between the dies, and means arranged in the upper die and controlled by the longer projection 0n the forming wheel to cut the material at the center of one of the crimps.

7. A machine for making piston ring springs comprising a base, a frame, a feed roller and an idler arranged in said frame to feed material to the machine, the diameter of the feed roller determining the size of the finished ring, a forming roller having a plurality of integral projections to crimp the material, the number of projections determining the number of crimps, guide pins fixed to said base and said frame, a guide slidably mounted on said guide pins, an upper die arranged in said guide, an operating roller mounted in said guide and operated by vsaid forming roller to reciprocate said upper die, a lower die rigidly supported in said frame whereby the material is crimped between said dies as it is fed therethrough, means operated by said upper die to cut the material after each complete revolution of the forming roller, and means operatively connected to the upper die for holding the material against the lower die.

8. A machine for making piston ring springs comprising a base, a frame, a feed roller and an idler arranged in said frame to feed material to the machine, the diameter of the feed roller determining the size of the finished ring, a forming roller having a plurality of integral projections to crimp the material, one of said projections being longer than the others, the number of projections determining the number of crimps, guide pins fixed to said base and said frame, a guide slidably mounted on said guide pins, an upper die arranged in said guide, an operating roller mounted in said guide meshing with and operated by said forming roller to reciprocate said upper die, a lower die rigidly supported in said frame whereby the material is crimped as it is fed between said dies, and shear blades connected to said upper die and adapted to engage slots in said lower die to cut the material, said blades being operated by engagement of the longer projection with the operating roller to further move the upper die.

9. A machine for making piston ring springs comprising a base7 a frame, a feed roller and an idler arranged in said frame to feed material to the machine, the diameter of the feed roller determining the size of the finished ring, a forming roller having a plurality of integral projections to crimp the material, one of said projections being longer than the others, the number of projections determining the number of crimps, guide pins fixed to said base and said frame, a guide slidably mounted on said guide pins, an upper die arranged in said guide, an operating roller mounted in said guide meshing with and operated by said forming roller if.- reciprocate said upper die, a lower die rigidric ly supported in said frame whereby the nia-` terial is crimped'as it is fed between said dies, shear blades connected to said upper die and adapted to engage slots in'said lower die to cut the material, said blaces being operated by engagement of the longer projection with the operating roller to further move the upper die, and means arranged in front of said feed roller to clean thematerial as it is beingfed to the machine.

10. yA machine for making piston ring springs comprising a. base, a frame, a feed roller and an idler arranged in said frame to feed material to the machine, the diameter of the feed roller determining the size of the finished ring, a forming roller having a. plurality of integral projections to crimp the material, one of said projections being longer than the others, the number of projections deter- Cal mining the number of crimps, guide pins fixed to said base and said frame, a guide slidably mounted on said guide pins, an upper die arranged in said guide, an operating' roller mounted in said guide meshing with and operated by said forming roller to reciprocate said upper die, a lower die rigidly supported in said frame whereby the material is crimped as it is fed between said'dies, shear blades connected to said upper die and adapt-` ed to engage slots in said lower die to cut the material at the center of one of the crimps, said blades being operated by engagement of the longer projection with the operating roll er to further move the upper die, means ar ranged in front of said feed roller to clean the material as it is being fed to the machine, and means operatively connected vto said upper die for holding the material in crimping `position. Y

11. A machine for making piston ring springs comprising a base, a frame, a feed roller and an idler arranged insaidlframe to feed material to the machine, the diameter of the feed roller determining the size of the finished ring, a forming roller having a plurality of integral projections to crimp the material, one of said projections being longer than the others, the number of projectionsdetermining the number of crimps to be made, guide pins fixed to said base and said frame, a guid-e slidably mounted on said guide pins, an upper die arranged in said guide, an operating roller mounted in said guide meshing with the forming roller and operated thereby to reciprocate said upper die, a lower die rigidly supported in said frame whereby the material is crimped as it is fed between the dies to crimp the material, shear blades connected to said upper die and adapted to engage slots in said lower die to cut the material at the center of one of the crimps, said blades being oper ated by engagement of the longer projection with the operating roller to further move the upper die, means arranged in front of said feed roller to clean the material as it is being` rial in crimping position, and guides ar# ranged below the lower die for directing the finished ring away from the dies.

12. In combination with a piston ring machine, of a forming roller therefor compris-y ing projections on said rollerfor crimping inner ring material, one of said projections be-V ing spaced unequally relativeto said otherprojections, so that each crimpn the finishedv ring will be spaced equally from each other.

13. A forming roller for piston ring machines having a plurality of projections thereon, one of which is longer than said other projections, and shear blades controlled by said longer projection, said longer projection being spaced at an unequal distance relative to said other projections, whereby the stock which is to be crimped by said proj ections will have the crimps equally spaced. Y

14. A machine for making piston ring springs comprising a base, a frame, means for providing a continuous feed of stock to the machine, means for making a predetermined number of crimps in the stock at spaced insoV tervals, each crimp having the same radius,

said crimping means comprising a lower fixed die and an upper reciprocable die, and means on saidjupper die for cutting-the finished ring i from the stock after the last crimp has been j made and while the upper die remains in clamping relation with the lower die so that. each ring will be divided at the center of the crimp. j Y

` OTTO E. SZEKELY.

RUSSELL H. JOHNSN.V

ioo- Y 

